/*
 * Copyright 2013-2020 The OpenZipkin Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.sunday.common.mq.rocket.brave.study.base.e10_Brave_Trace;

import brave.internal.Nullable;
import org.apache.rocketmq.common.message.Message;

import java.util.Map;

class MessageHeaders {

    @Nullable
    static String getHeaderIfString(Message message, String name) {
        Map<String, String> properties = message.getProperties();
        if (properties == null) return null;
        Object o = properties.get(name);
        if (o instanceof String) return o.toString();
        return null;
    }

    static void setHeader(Message message, String name, String value) {
        Map<String, String> properties = message.getProperties();
        if (properties == null) return;
        properties.put(name, value);
    }
}
